Vicenial or Vicennial: How To spell?

The word Vicenial is misspelled against Vicennial, an adjective meaning "Happening once in twenty years; as, a vicennial celebration."

Vicennial has double "nn" is mispronounced as "n"
Remember double 'NN' in between the strings vice & ial which should not be misspelled with single 'N'
Wrong Spelling: vice-n-ial
Correct Spelling: vice-nn-ial
Find more wrongly spelled words of Vicennial to spell it well.